Part Details | EXTERNALLY RELIEVED BODY SCREW
5305-00-638-1649 An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.
Alternate Parts: 2053255, 648697000, 648697-000, 648697, 2053255, A2053255, 8060000496, 2053255, 5305-00-638-1649, 00-638-1649, 5305006381649, 006381649
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JAN 01, 1961 | 00-638-1649 | 01852 ( SCREW, EXTERNALLY RELIEVED BODY ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON COUNTERSUNK UNDERCUT
CROSS RECESS TYPE 1
ROUND
Cross Reference | NSN 5305-00-638-1649
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 2053255 | 80086 | AIRCO CRYOGENICS DIV OF AIRCO INC |
| 648697-000 | 12436 | BAE SYSTEMS INFORMATION ANDELECTRONIC SYSTEMS INTEGRATION INC. |
| 648697 | 12436 | BAE SYSTEMS INFORMATION ANDELECTRONIC SYSTEMS INTEGRATION INC. |
| 2053255 | 28527 | HARRIS CORPORATIONDBA ELECTRONIC SYSTEMS, INTEGRATED |
| A2053255 | 28527 | HARRIS CORPORATIONDBA ELECTRONIC SYSTEMS, INTEGRATED |
| 8060000496 | 57057 | NAVCOM DEFENSE ELECTRONICS, INC. |
| 2053255 | 57057 | NAVCOM DEFENSE ELECTRONICS, INC. |
Technical Data | NSN 5305-00-638-1649
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.344 INCHES MINIMUM |
| FASTENER LENGTH | 0.938 INCHES NOMINAL |
| HEAD STYLE | 6 HEXAGON COUNTERSUNK UNDERCUT |
| HEAD DIAMETER | 0.375 INCHES NOMINAL |
| HEAD HEIGHT | 0.250 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| HOLE CONFIGURATION STYLE | ROUND |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 1 |
| HOLE DIAMETER | 0.063 INCHES NOMINAL |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 |
| FIRST DIAMETER FROM HEAD | 0.164 INCHES NOMINAL |
| SECOND DIAMETER FROM HEAD | 0.109 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.040 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.594 INCHES NOMINAL |
| SPECIAL FEATURES | 45.0 DEGREE TO POINT AT THREAD END OF SCREW |